sys-libs/zlib-ng: add 2.1.6

Closes: https://bugs.gentoo.org/908658
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 92 insertions, 0 deletions

diff --git a/sys-libs/zlib-ng/Manifest b/sys-libs/zlib-ng/Manifest
index 9fd23cff9381..cb8973e9d0a3 100644
--- a/sys-libs/zlib-ng/Manifest
+++ b/sys-libs/zlib-ng/Manifest
@@ -1 +1,2 @@
 DIST zlib-ng-2.1.5.tar.gz 2410601 BLAKE2B 7370ee38c05855e3a5e6976826690790adab7d68d877bf01f68969c99ad4a5fc8fd265a160e147b110969ff77ee97aab9c9d227a526d645a496eae76b2c27b04 SHA512 9212d87c63a2da4e5355a7a1c75380aeba40fbd0ea3d71d3784cb3eac94237f9bea2a1b7993a08f39d4197725c4c133087d3a9d213d3944aa48a7559de2be920
+DIST zlib-ng-2.1.6.tar.gz 2412106 BLAKE2B 9ca16c19c2c799e68e099d44721b27dc33ad9e859a3d6572bebe3a75c618bffd78e19f0d4c0607802d1c8fa6a8f328d62f9993648a99c1d2e0e5fdcaf87a2667 SHA512 59ef586c09b9a63788475abfd6dd59ed602316b38f543f801bea802ff8bec8b55a89bee90375b8bbffa3bdebc7d92a00903f4b7c94cdc1a53a36e2e1fd71d13a
diff --git a/sys-libs/zlib-ng/zlib-ng-2.1.6.ebuild b/sys-libs/zlib-ng/zlib-ng-2.1.6.ebuild
new file mode 100644
index 000000000000..d2217e6f0db3
--- /dev/null
+++ b/sys-libs/zlib-ng/zlib-ng-2.1.6.ebuild
@@ -0,0 +1,91 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Worth keeping an eye on 'develop' branch upstream for possible backports,
+# as they copied this practice from sys-libs/zlib upstream.
+
+inherit cmake-multilib
+
+DESCRIPTION="Fork of the zlib data compression library"
+HOMEPAGE="https://github.com/zlib-ng/zlib-ng"
+SRC_URI="https://github.com/${PN}/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="ZLIB"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~riscv ~x86"
+
+CPU_USE=(
+	x86_{avx2,avx512f,sse2,ssse3,sse4_2,pclmul}
+	arm_{crc32,neon}
+	ppc_{altivec,vsx2,vsx3}
+)
+IUSE="compat ${CPU_USE[@]/#/cpu_flags_} test"
+
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	test? ( dev-cpp/gtest )
+"
+RDEPEND="
+	compat? ( !sys-libs/zlib )
+"
+
+multilib_src_configure() {
+	local mycmakeargs=(
+		-DZLIB_COMPAT=$(usex compat)
+		-DZLIB_ENABLE_TESTS=$(usex test)
+		-DWITH_GTEST=$(usex test)
+
+		# Unaligned access is controversial and undefined behaviour
+		# Let's keep it off for now
+		# https://github.com/gentoo/gentoo/pull/17167
+		-DWITH_UNALIGNED=OFF
+	)
+
+	# The intrinsics options are all defined conditionally, so we need
+	# to enable them on/off per-arch here for now.
+	# TODO: There's no s390x USE_EXPAND yet
+	if use amd64 || use x86 ; then
+		mycmakeargs+=(
+			-DWITH_AVX2=$(usex cpu_flags_x86_avx2)
+			-DWITH_AVX512=$(usex cpu_flags_x86_avx512f)
+			-DWITH_AVX512VNNI=OFF # TODO, see bug #908556
+			-DWITH_SSE2=$(usex cpu_flags_x86_sse2)
+			-DWITH_SSSE3=$(usex cpu_flags_x86_ssse3)
+			-DWITH_SSE42=$(usex cpu_flags_x86_sse4_2)
+			-DWITH_PCLMULQDQ=$(usex cpu_flags_x86_pclmul)
+			-DWITH_VPCLMULQDQ=OFF # TODO, see bug #908556
+		)
+	fi
+
+	if use arm || use arm64 ; then
+		mycmakeargs+=(
+			-DWITH_ACLE=$(usex cpu_flags_arm_crc32)
+			-DWITH_NEON=$(usex cpu_flags_arm_neon)
+		)
+	fi
+
+	if use ppc || use ppc64 ; then
+		# The POWER8 support is VSX which was introduced
+		# VSX2 was introduced with POWER8, so use that as a proxy for it
+		mycmakeargs+=(
+			-DWITH_ALTIVEC=$(usex cpu_flags_ppc_altivec)
+			-DWITH_POWER8=$(usex cpu_flags_ppc_vsx2)
+			-DWITH_POWER9=$(usex cpu_flags_ppc_vsx3)
+		)
+	fi
+
+	cmake_src_configure
+}
+
+pkg_postinst() {
+	if use compat ; then
+		ewarn "zlib-ng is experimental and replacing the system zlib is dangerous"
+		ewarn "Please be careful!"
+		ewarn
+		ewarn "The following link explains the guarantees (and what is NOT guaranteed):"
+		ewarn "https://github.com/zlib-ng/zlib-ng/blob/2.0.x/PORTING.md"
+	fi
+}